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Quasi-Optimized Overlapping Schwarz Waveform Relaxation Algorithm for PDEs with Time-Delay

Published online by Cambridge University Press:  03 June 2015

Shu-Lin Wu  and
Ting-Zhu Huang
Shu-Lin Wu*
Affiliation:
School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China School of Science, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, China
Ting-Zhu Huang*
Affiliation:
School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
*
Corresponding author.Email:[email protected]
Email:[email protected]
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Abstract

Schwarz waveform relaxation (SWR) algorithm has been investigated deeply and widely for regular time dependent problems. But for time delay problems, complete analysis of the algorithm is rare. In this paper, by using the reaction diffusion equations with a constant discrete delay as the underlying model problem, we investigate the convergence behavior of the overlapping SWR algorithm with Robin transmission condition. The key point of using this transmission condition is to determine a free parameter as better as possible and it is shown that the best choice of the parameter is determined by the solution of a min-max problem, which is more complex than the one arising for regular problems without delay. We propose new notion to solve the min-max problem and obtain a quasi-optimized choice of the parameter, which is shown efficient to accelerate the convergence of the SWR algorithm. Numerical results are provided to validate the theoretical conclusions.

Keywords

30E1065M1265M55Schwarz methodwaveform relaxationtime delaymin-max problem
Type
Research Article
Information
Communications in Computational Physics , Volume 14 , Issue 3 , September 2013 , pp. 780 - 800
Copyright
Copyright © Global Science Press Limited 2013

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